EP2531796B1 - Dispositif de séchage d'objets - Google Patents

Dispositif de séchage d'objets Download PDF

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Publication number
EP2531796B1
EP2531796B1 EP11705430.4A EP11705430A EP2531796B1 EP 2531796 B1 EP2531796 B1 EP 2531796B1 EP 11705430 A EP11705430 A EP 11705430A EP 2531796 B1 EP2531796 B1 EP 2531796B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
air
primary gas
air heat
hot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11705430.4A
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German (de)
English (en)
Other versions
EP2531796A1 (fr
Inventor
Apostolos Katefidis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eisenmann SE
Original Assignee
Eisenmann SE
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Publication date
Application filed by Eisenmann SE filed Critical Eisenmann SE
Publication of EP2531796A1 publication Critical patent/EP2531796A1/fr
Application granted granted Critical
Publication of EP2531796B1 publication Critical patent/EP2531796B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/02—Heating arrangements using combustion heating
    • F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/12—Vehicle bodies, e.g. after being painted

Definitions

  • Such from the market and from the DE 10 2008 012 792 A1 known dryers are used in particular for drying freshly painted vehicle bodies, but also for drying other objects.
  • Such dryers are heated by, among other things, sucking air from short tunnel sections, which are short in relation to the total length of the drying tunnel, heated in a heating unit by means of a heat exchanger and recirculated to the corresponding tunnel section.
  • the air taken from the tunnel section is mainly loaded with solvent, which is released during the drying process.
  • solvent-containing air or exhaust air will be discussed below.
  • the disposal of the solvent-containing exhaust air takes place in other known systems in a separate and independent of the heating circuits system.
  • the solvent-containing exhaust air to be disposed of is sucked off at a central outlet of the drying tunnel and fed to a thermal or regenerative afterburning, in which the solvents are burned.
  • the afterburning heat exchanger downstream in which fresh air is heated by means of the resulting hot combustion gases. This hot fresh air is then fed to the drying tunnel, whereby this is also heated.
  • the afterburning and thus the disposal of the solvent-containing exhaust air is integrated in the device of the type mentioned in the heating unit and only a portion of the tunnel section removed air recirculated as recirculated air back into the tunnel section.
  • the hot combustion gases form at least in part the hot primary gas flow which is used to heat the recirculation air. As a result, the energy contained in the hot combustion gases is effectively used to heat the dryer.
  • the heating unit comprises an exhaust air heat exchanger in which hot primary gas is conductive and in which the exhaust air is heated by hot primary gas before reaching the afterburner, the exhaust air can be preheated prior to their combustion. In this way, the energy required by the burner can be reduced, which is required to heat the solvent-containing exhaust air from its initial temperature, with which it reaches the burner, to the combustion temperature.
  • the amount of hot primary gas supplied to the exhaust air heat exchanger is adjustable by means of a first regulating flap located in a bypass line through which hot primary gas can be passed past the exhaust air heat exchanger, the extent of preheating the exhaust air can be adjusted.
  • the afterburner is a gas burner.
  • the hot primary gas flow consists solely of hot combustion gases, which are thus fully and effectively used to heat the recirculation air.
  • the gas burner is a surface burner.
  • a surface burner offers a good burning performance and does not require any additional air supply.
  • hot primary gas which has flowed through the exhaust air heat exchanger
  • the hot combustion gases can be used twice and thus particularly effectively. They then serve on the one hand for preheating the exhaust air and on the other hand for heating the circulating air.
  • the circulating air heat exchanger hot primary gas from a section of the bypass line can be fed downstream the first regulating flap is arranged. In this way, the recirculating air heat exchanger is not or only very little cooled primary gas can be supplied.
  • the section of the bypass line is arranged between the first regulating flap and a second regulating flap, the amount of primary gas for the circulating air heat exchanger can be regulated via the second regulating flap, without the position of the first regulating flap and of the exhaust air heat exchanger passing by guided part of the primary gas flow would have to be changed.
  • the heating unit comprises a fresh air heat exchanger in which hot primary gas is conductive and in the fresh air can be heated by hot primary gas
  • the primary gas can also be used to heat any fresh air required for dryer heating.
  • the primary gas flow can be used in triplicate if the heating unit comprises a fresh air heat exchanger in which hot primary gas can be conducted, which has flowed through the exhaust air heat exchanger and the recirculating air heat exchanger.
  • the fresh primary gas supplied to the fresh air heat exchanger may have previously passed through only the exhaust air heat exchanger or the recirculating air heat exchanger.
  • the fresh air heat exchanger hot Primary gas from a portion of the bypass line can be fed, which is arranged downstream of the second regulating flap.
  • Hot fresh air is supplied in particular to an inlet lock area arranged at the entrance of the drying tunnel and / or to an outlet lock area arranged at the exit of the drying tunnel, from where the hot fresh air can flow into the drying tunnel.
  • FIG. 1 10 is a total of 10 a dryer comprising an insulated housing 12 in which a drying tunnel 14 is arranged.
  • the drying tunnel 14 comprises a plurality of tunnel sections 16.1, 16.2, ..., 16.n arranged one behind the other.
  • the dryer 10 is used in particular for drying freshly painted vehicle bodies, but can also be used in its basic concept for drying any objects.
  • the vehicle bodies enter the dryer 10 at one end of the dryer 10 on a conveyor system (not shown), first pass into an inlet lock 18 and from there into the drying tunnel 14. The vehicle bodies finally exit the dryer 10 through an outlet lock 20 in the dried state, after they have passed through the tunnel sections 16.1, 16.2, ..., 16.n.
  • Each tunnel section 16.1, 16.2,..., 16.n has an air outlet 22 and an air inlet 24.
  • Each tunnel section 16.1, 16.2, ..., 16.n is also assigned its own heating unit 26, of which in FIG. 1 only the heating units 26 of the tunnel sections 16.1 and 16.2 can be seen.
  • the heating units 26 can be heated from the respective tunnel section 16.1, 16.2, ..., 16.n sucked air and be returned in a cycle through the respective air inlet 24 in the corresponding tunnel section 16.1, 16.2, ..., 16.n.
  • the returned air is e.g. guided on non-specifically illustrated nozzles on the vehicle bodies to be dried.
  • heating units 26 The structure and operation of the heating units 26 will now be described using the example of the tunnel section 16.1 associated heating unit 26.
  • the remaining heating units 26 are constructed accordingly and work in the same manner.
  • the heating unit 26 comprises a fan 28 which is arranged in a line 30 which is connected to the air outlet 22 of the tunnel section 16.1, so that solvent-containing air can be sucked out of the tunnel section 16.1.
  • This solvent-containing air is usually between about 140 ° C and 220 ° C hot.
  • the temperatures specified below relate to a drying process and a air balance, as they usually occur during drying of cataphoretic dip-coated vehicle bodies, for example. Depending on the type of varnish used, deviations upwards and downwards are possible accordingly.
  • the solvent-containing air in the tunnel section 16.1 is about 200 ° C hot.
  • the line 30 opens downstream into a distribution device 32 which divides the sucked air into an exhaust air stream and a recirculating air stream.
  • the exhaust air flows from the distributor device 32 further through a line 34 into a heat exchanger coil 36 of an exhaust air heat exchanger 38. From there it flows into a combustion chamber 40 of a thermal afterburning device 42 with a gas burner 44, which is indicated by two arrows 46 and 48.
  • a gas burner 44 a burner is used in the embodiment described here, which can be operated without the supply of additional air.
  • a surface burner has proven itself, as it is known in and of itself.
  • a forced-air burner which must be supplied with air in a known manner for operation.
  • the Solvent in the exhaust air burned as much as possible, with the primary gas hot combustion gases produced at a temperature of about 700 ° C.
  • These hot combustion gases are conducted via a feed line 50 to the exhaust air heat exchanger 38, where they heat the flowing through the heat exchanger coil 36 solvent-containing exhaust air to a temperature of about 400 ° C. At this temperature, the solvent-containing exhaust air consequently flows into the combustion chamber 40 of the thermal afterburning device 42.
  • the originally about 700 ° C hot combustion gases are cooled in the exhaust air heat exchanger 38 and leave this via a first intermediate line 52 at a temperature of about 450 ° C.
  • the combustion gases are passed into a recirculating air heat exchanger 54.
  • Whose heat exchanger coil 56 is traversed by the circulating air, which is supplied to the circulation air heat exchanger 54 via a line 56 from the manifold 32.
  • the recirculating air coming from the distributor 32 at a temperature of about 200 ° C is heated by the hot combustion gases to a temperature of about 220 ° C, the hot combustion gases in turn cooling from about 450 ° C to a temperature of about 350 ° C.
  • the approximately 220 ° C hot recirculating air flows from the heat exchanger coil 56 of the recirculating air heat exchanger 54 in a return line 58, which leads to the air inlet 24 of the tunnel section 16.1. From there, the air is guided back to the vehicle bodies to be dried.
  • the now about 350 ° C hot combustion gases flow in the heating unit 26 from the circulation air heat exchanger 54 via an intermediate line 60 in a fresh air heat exchanger 62, whose heat exchanger coil 64 is fed via a fresh air line 66 with a fan 68.
  • the fresh air in the heat exchanger coil 64 is heated to about 200 ° C, wherein the hot combustion gases in turn cool to about 80 ° C.
  • the hot fresh air leaves the fresh air heat exchanger 62 via a line 70, which leads to the entrance lock 18. From there it enters the drying tunnel 14.
  • the cooled to 80 ° C combustion gases are passed through a discharge line 72 through a condensate 74 and from there to an exhaust chimney 76. About this get the purified combustion gases into the environment.
  • the supply line 50 is connected to the exhaust air heat exchanger 38 with the discharge line 72 at the fresh air heat separator 62 via a bypass line 78 in connection.
  • This has four bypass sections 78a, 78b, 78c and 78d, wherein between the first section 78a and the second section 78b, a first regulating flap 80, between the second section 78b and the third section 78c, a second regulating flap 82 and between the third section 78c and the fourth section 78d, a third regulating flap 84 is arranged.
  • the second bypass section 78b communicates via a conduit 86 with the intermediate conduit 52 between the exhaust air heat exchanger 38 and the recirculating air heat exchanger 54 in connection.
  • the third bypass section 78c communicates via a line 88 with the intermediate line 60 between the recirculating air heat exchanger 38 and the fresh air heat exchanger 54 in connection.
  • the hot combustion gases are completely guided out of the combustion chamber 40 into the exhaust air heat exchanger 38.
  • the exhaust air is thereby preheated in the exhaust air heat exchanger 38 to 400 ° C, whereby relatively little energy is required for the gas burner 44 to heat the thus preheated exhaust air to the combustion temperature of 700 ° C.
  • the first regulating flap 80 can be opened.
  • a portion of the about 700 ° C hot combustion gases are thereby passed from the combustion chamber via the first two bypass sections 78a and 78b and the line 86 in the first intermediate line 52, where they mix with the coming of the exhaust air heat exchanger 38 combustion gases.
  • the resulting combustion gas flow has a higher temperature than the combustion gases coming from the exhaust air heat exchanger 38.
  • more energy is supplied to the recirculating air heat exchanger 54 for heating the recirculation air.
  • the proportion of the combustion gases flowing through the bypass line 78 into the intermediate line 52, and thus the energy supplied to the recirculating air heat exchanger 54 as a result of the mixing of the two gas streams, can be controlled via the opening degree of the first regulating flap 80.
  • the exhaust air in the exhaust air heat exchanger 38 is preheated when the first regulating flap 80 is opened no more to the extent as with closed first regulating flap 80.
  • the power of the gas burner 44 must be increased to reach the combustion temperature in the combustion chamber 40, which leads to a higher consumption of fuel gas for the gas burner 44.
  • the additional opening of the second regulating flap 82 in the bypass line 78 causes the hot combustion gases from the combustion chamber 40 to enter the intermediate conduit 60 where they heat the combustion gas stream coming from the recirculating air heat exchanger 54.
  • the combustion gases then flow at a higher temperature into the fresh air heat exchanger 62 than in the case of the closed second regulating flap 82.
  • the proportion of the combustion gases flowing through the bypass line 78 into the intermediate line 60, and thus the energy which is supplied to the fresh air heat exchanger 62 as a result of the mixing of the two gas streams, can here via the opening degree of the second regulating flap 82, optionally in conjunction with the opening degree of the first regulating flap 80, are controlled.
  • the opening degree of the second Regulator flap 82 of course also affects the proportion of the combustion gases flowing through the bypass line 78, which reach the first intermediate line 52, which in turn affects the temperature of the result in the recirculation heat exchanger 54 combustion gas flow.
  • regulating valves are also provided in one or both lines 86, 88.
  • a bypass flow path of combustion gases at the exhaust air heat exchanger 38 and the recirculating air heat exchanger 54 to the fresh air heat exchanger 62 or a bypass flow path of combustion gases on all three heat exchangers 38, 54 and 62 to the discharge line 72 are additionally possible ,
  • Each heating chamber 26 thus contributes both to the disposal of solvent-containing exhaust air and to heating of the dryer.
  • the entrained by the exhaust pollutants are largely converted directly into usable energy in the heating chambers 26.
  • the burner no additional fresh air must be supplied; for the combustion air or the primary gas flow directly the hot exhaust air is used.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Coating Apparatus (AREA)

Claims (11)

  1. Dispositif de séchage d'objets, en particulier de carrosseries de véhicules, comprenant
    a) un tunnel de séchage (14) qui est disposé dans une enceinte isolée (12) ;
    b) une pluralité de sections de tunnel (16.1, 16.2, ..., 16.n) qui comprennent chacune au moins une sortie d'air (22) et au moins une entrée d'air (24) ;
    dans lequel
    c) un groupe de chauffage (26) est associé à chaque section de tunnel (16.1, 16.2, ..., 16.n), auquel peut être amené de l'air venant de ladite au moins une sortie d'air (22) de la section de tunnel (16.1, 16.2, ..., 16.n) et dans lequel un courant de gaz primaire chaud peut être produit ;
    d) le gaz primaire chaud peut être conduit dans un échangeur de chaleur à air de circulation (54) du groupe de chauffage (26), dans lequel de l'air de circulation peut être chauffé par le gaz primaire chaud, lequel air de circulation peut être ramené dans un circuit à la section de tunnel (16.1, 16.2, ..., 16.n) par ladite au moins une entrée d'air (24) ;
    e) le groupe de chauffage (26) comprend un dispositif répartiteur (32) par lequel l'air sortant d'une section de tunnel (16.1, 16.2, ..., 16.n) peut être divisé en un courant d'air de circulation et un courant d'air d'évacuation ;
    f) le groupe de chauffage (26) comprend un dispositif thermique de post-combustion (42) auquel l'air d'évacuation peut être amené et par lequel le courant de gaz primaire chaud peut être produit,
    caractérisé en ce que
    g) le groupe de chauffage (26) comprend un échangeur de chaleur à air d'évacuation (38) dans lequel du gaz primaire chaud peut être conduit et dans lequel l'air d'évacuation peut être chauffé par du gaz primaire chaud avant d'atteindre le dispositif de post-combustion (42) ;
    h) la quantité de gaz primaire chaud qui est amenée à l'échangeur de chaleur à air d'évacuation (38) est réglable au moyen d'un premier clapet de régulation (80) ;
    i) le premier clapet de régulation (80) est disposé dans une conduite de dérivation (78) à travers laquelle du gaz primaire chaud peut être dérivé de l'échangeur de chaleur à air d'évacuation (38).
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de post-combustion (42) est un brûleur à gaz.
  3. Dispositif selon la revendication 2, caractérisé en ce que le brûleur à gaz (42) peut fonctionner sans apport d'air supplémentaire.
  4. Dispositif selon la revendication 3, caractérisé en ce que le brûleur à gaz (42) est un brûleur de surface.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce qu'à l'échangeur de chaleur à air de circulation (54) peut être amené du gaz primaire chaud qui a traversé l'échangeur de chaleur à air d'évacuation (38).
  6. Dispositif selon la revendication 5, caractérisé en ce qu'à l'échangeur de chaleur à air de circulation (54) peut être amené du gaz primaire chaud venant d'une section (78b) de la conduite de dérivation (78) qui est disposée en aval du premier clapet de régulation (80).
  7. Dispositif selon la revendication 6, caractérisé en ce que la section (78b) de la conduite de dérivation (78) est disposée entre le premier clapet de régulation (80) et un deuxième clapet de régulation (82).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que le groupe de chauffage (26) comprend un échangeur de chaleur à air frais (62) dans lequel peut être conduit du gaz primaire chaud et dans lequel de l'air frais peut être chauffé par le gaz primaire chaud.
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que le groupe de chauffage (26) comprend un échangeur de chaleur à air frais (62) dans lequel peut être conduit du gaz primaire chaud qui a traversé l'échangeur de chaleur d'air d'évacuation (38) et/ou l'échangeur de chaleur à air de circulation (54).
  10. Dispositif selon la revendication 8 ou la revendication 9 en référence à la revendication 7, caractérisé en ce qu'à échangeur de chaleur à air frais (62) peut être amené du gaz primaire chaud venant d'une section (78c) de la conduite de dérivation (78) qui est disposée en aval du deuxième clapet de régulation (82).
  11. Dispositif selon l'une des revendications 8 à 10, caractérisé en ce que de l'air frais chaud peut être amené à une zone de sas d'entrée (18) disposée à l'entrée du tunnel de séchage (14) et/ou à une zone de sas de sortie (20) disposée à la sortie du tunnel de séchage (14), d'où l'air frais chaud peut être introduit dans le tunnel de séchage (14).
EP11705430.4A 2010-02-01 2011-01-26 Dispositif de séchage d'objets Not-in-force EP2531796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010006550.1A DE102010006550B4 (de) 2010-02-01 2010-02-01 Vorrichtung zum Trocknen von Gegenständen
PCT/EP2011/000324 WO2011091992A1 (fr) 2010-02-01 2011-01-26 Dispositif de séchage d'objets

Publications (2)

Publication Number Publication Date
EP2531796A1 EP2531796A1 (fr) 2012-12-12
EP2531796B1 true EP2531796B1 (fr) 2016-04-27

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Application Number Title Priority Date Filing Date
EP11705430.4A Not-in-force EP2531796B1 (fr) 2010-02-01 2011-01-26 Dispositif de séchage d'objets

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Country Link
EP (1) EP2531796B1 (fr)
JP (1) JP5990104B2 (fr)
CN (1) CN102906522B (fr)
BR (1) BR112012018965B1 (fr)
DE (1) DE102010006550B4 (fr)
WO (1) WO2011091992A1 (fr)

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DE102011119436B4 (de) * 2011-11-25 2020-08-06 Eisenmann Se Vorrichtung zum Temperieren von Gegenständen
DE102012004246A1 (de) * 2012-03-01 2013-09-05 Eisenmann Ag Vorrichtung zur thermischen Nutzung eines Primärfluids und Anlage zur Behandlung von Gegenständen mit einer solchen
DE102012023457A1 (de) * 2012-11-30 2014-06-05 Eisenmann Ag Verfahren und Vorrichtung zum Temperieren von Gegenständen
DE102013004136A1 (de) * 2013-03-09 2014-09-11 Volkswagen Aktiengesellschaft Vorrichtung zum Trocknen eines Werkstücks und Verfahren zum Betrieb einer derartigen Vorrichtung
DE202013105737U1 (de) * 2013-12-17 2014-02-12 mecoplan GmbH Trocknungsanlage
DE102015102955B4 (de) * 2015-03-02 2017-03-23 Sturm Maschinen- & Anlagenbau Gmbh Verfahren und Anlage zur Oberflächenbehandlung eines Werkstückes
DE102015003856A1 (de) * 2015-03-26 2016-09-29 Eisenmann Se Vorrichtung zur Temperierung von Gegenständen
DE102015214711A1 (de) 2015-07-31 2017-02-02 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102015214706A1 (de) 2015-07-31 2017-02-02 Dürr Systems Ag Behandlungsanlage und Verfahren zum Behandeln von Werkstücken
DE102016001893A1 (de) 2016-02-17 2017-08-17 Eisenmann Se Brennereinheit und Vorrichtung zum Temperieren von Gegenständen
DE102016125060B4 (de) 2016-12-21 2023-02-16 Eisenmann Gmbh Vorrichtung zum Temperieren von Gegenständen
DE102017105094A1 (de) 2017-03-10 2018-09-13 Eisenmann Se Temperiervorrichtung für oberflächenbehandelte Gegenstände wie Fahrzeugteile
JP7041705B2 (ja) 2020-03-18 2022-03-24 本田技研工業株式会社 樹脂硬化装置及び樹脂硬化方法

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DE102005061973B4 (de) * 2005-12-23 2013-12-19 Eisenmann Ag Trockner
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DE102009021004A1 (de) * 2009-04-24 2010-10-28 Dürr Systems GmbH Trocknungs- und/oder Härtungsanlage

Also Published As

Publication number Publication date
BR112012018965B1 (pt) 2020-12-15
EP2531796A1 (fr) 2012-12-12
JP2013518236A (ja) 2013-05-20
CN102906522B (zh) 2015-11-25
CN102906522A (zh) 2013-01-30
DE102010006550A1 (de) 2011-08-04
DE102010006550B4 (de) 2015-08-13
BR112012018965A2 (pt) 2017-10-10
JP5990104B2 (ja) 2016-09-07
WO2011091992A1 (fr) 2011-08-04

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